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Finding the Fourth Proportional to 142.53, 212.45 and 135.64

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Solution

The fourth proportional to 142.53, 212.45 and 135.64 is: 202.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.53 : 212.45 = 135.64 : x
  2. Step 2: Convert to fraction form
    142.53/212.45 = 135.64/x
  3. Step 3: Cross multiply
    142.53x = 212.45 × 135.64
  4. Step 4: Simplify right side
    142.53x = 28,816.72
  5. Step 5: Solve for x
    x = 28,816.72/142.53
  6. Step 6: Final answer
    x = 202.18

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.